#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include<arpa/inet.h>
#include<sys/socket.h>
#define BUF_SIZE 30
void error_handling(char *message);
//半关闭传输文件
int main(int argc,char *argv[])
{
	int sd;
	FILE *fp;
	char buf[BUF_SIZE];
	int read_cnt;
	struct sockaddr_in serv_adr;
	if(argc!=3)
	{
		printf("Usage:%s<IP><port>\n",argv[0]);
		exit(1);
	}
	fp=fopen("receive.dat","wb");
	sd=socket(PF_INET,SOCK_STREAM,0);
	memset(&serv_adr,0,sizeof(serv_adr));
	serv_adr.sin_family=AF_INET;
	serv_adr.sin_addr.s_addr=inet_addr(argv[1]);
	serv_adr.sin_port=htons(atoi(argv[2]));
	connect(sd,(struct sockaddr*)&serv_adr,sizeof(serv_adr));
	
	while((read_cnt=read(sd,buf,BUF_SIZE))!=0)
		fwrite((void*)buf,1,read_cnt,fp);
	puts("Received file data");
	write(sd,"Thank you",10);	
	fclose(fp);
	close(sd);
	return 0;
}
void error_handling(char *message)
{
	fputs(message,stderr);
	fputc('\n',stderr);
	exit(1);
}
